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<table width="100%" summary="page for co2s"><tr><td>co2s</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Atmospheric CO2 at South Pole</h2>

<h3>Description</h3>

<p>Monthly CO2 concentration in parts per million at the South Pole.
</p>


<h3>Usage</h3>

<pre>
data(co2s)
</pre>


<h3>Format</h3>

<p>A data frame with 3 columns and 507 rows. The columns are:
</p>

<dl>
<dt>co2</dt><dd><p>atmospheric CO2 concentration in parts per million</p>
</dd>
<dt>c.month</dt><dd><p>cumulative number of months since Jan 1957</p>
</dd>
<dt>month</dt><dd><p>month of year</p>
</dd>
</dl>


<h3>Source</h3>

<p><a href="http://cdiac.esd.ornl.gov/trends/co2/">http://cdiac.esd.ornl.gov/trends/co2/</a>
</p>


<h3>References</h3>

<p>Keeling C.P. and T.P Whorf (2000) Atmospheric CO2 records from sites in the
SIO air sampling network. In Trends: A Compedium of Data on Global
Change. Carbon Dioxide Analyis Center, Oak Ridge National Laboratory,
U.S. Department of Energy, Oak Ridge Tenn., USA
</p>
<p>Wood, S.N. (2006, 2017) Generalized Additive Models: An Introduction with R. CRC
</p>


<h3>Examples</h3>

<pre>
  data(co2s)
  with(co2s,plot(c.month,co2,type="l",ylab=
  expression(paste(CO[2]," in ppm.")),xlab="Month since Jan. 1957"))
</pre>


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